Jar for removing standing valves



Dec. 16, 1924. 1,519,219

A. G. ROBERTS JAR FOR REMOVING STANDING VALVES Filed Oct. 24, 1923 ation/w13 Patented Dec. 16, 1924.

UNITED STATES ALVA Gr. ROBERTS, OF ERIE, KANSAS.

JAR FOR REMOVING STANDING VALVES.

Application led October 24, 1923.

To all wlw/m, t may 00a-067%.'

Be it known that I, ALvA G. ROBERTS, a citizen of the United States, residing at Erie, in the county of Neosho and State of Kan- Sas, have invented a new and useful J ar for Removing Standing Valves, of which the following is a sp'eciiication.

The object of my invention is to provide an improvement in apparatus used in oil well drilling` machinery for use in removing valves from oil well pumps and which provides novel means for giving a jerk or jar to the valve whereby it may be removed quickly and easily; and to provide the novel combination and arrangement of parts disclosed in the accompanying drawings, in which Figure l is a vertical sect-ion through my invention with plunger 7 at the end of its stroke;

Fig. 2 is a section on line 2-2 of F ig, l with plunger 7 in its raised position;

Fig. 3 is a top plan view; and

Fig. 4 is a transverse section on line 4-4 of Fig. 1.

Like numerals indicate like parts throughout the several views.

Referring to the accompanying drawings, I provide a tube l having a tapered lower end 2 provided with external screw threads 8. The inner portion of the upper end ot the tube is provided with an annular shoulder 4 and a short central channel 5. Loosely and slidably mounted in tube 4 is a plunger or jar 7 having a plunger head 10 on its lower end, the lower end of this plunger head having bifurcated ends 11 adapted to engage around the pin 6 which extends transversely through and is fixed in the lower end of the tube l, as shown in Figs. l and 2. The upper end of plunger 7 is provided with an angular wrench head 9 above which is a screw threaded cylindrical end portion 8.

ln operation, the threaded end of the plunger is screwed into the sucker rod of the oil drilling machinery and the external bottom threaded end 3 of the pipe l is screwed into the standing valve which is to be removed, the engagement of the bifurcated end of plunger head 10 over the pin 6 which extends through the lower end of the pipe 1 permitting of turning the pipe` for screwing the lower end into the top of the standing valve. The annular shoulder t at the upper end of the pipe prevents the plunger from being withdrawn entirely from the tube.

Serial No. 670,567.

W hen the plunger is screwed on the end ot a sucker rod it will move `freely from the pin 6 toward the top or annular shoulder l over a distance of about l2 inches before it will cause any pressure on the standing valve. The plunger is allowed to drop, giving a jerk or jar on the pipe and consequently on the standing valve which has thc effect of loosening it, although it may fit ever so tightly, permitting its quick and easy rcmoval. The device is one that is most useful to persons engaged in the pumping and care of oil wells.

What I claim is l. A jar for removing the standing valve of oil well apparatus, comprising a pipe having an externally threaded lower end, a plunger slidably mounted in the pipe, said plunger having a bifurcated plunger head` a pin extending transversely through and fixed in the lower end of the pipe over which the biturcated end of the plunger head engages, means for preventing withdrawal of the plunger from the pipe, and means for attaching the upper end of the plunger to suitable operating means.

2. In a device of the class described, the combination of a pipe having an internal annular shoulder at its upper end, and having' a tapered externally threaded lower end adapted to be screwed into the standing valve, a pin extending transversely through the lower end o-iE the pipe, a plunger slidably mounted in the pipe and having a bifurcated plunger head adapted to engage around the transverse pin when the plunger is in its lowermost position and adapted to abut against the annular shoulder when in its raised position, and means for attaching the plunger to suitable operating means.

3. In a device of the class described, the combination of a pipe having an internal annular shoulder at its upper end, and having a tapered externally' threaded lower end adapted to be screwed into the standing valve, a pin extending transversely through the lower end of the pipe, a plunger slid ably mounted in the pipe and having a bifurcated plunger head adapted to engage around the transverse pin when the plunger is in its loWermost position and adapted to abut against the annular shoulder when in its raised position` the plunger having a threaded upper end and having an angular wrench-engaging portion near its upper end.

ALVA G. ROBERTS. 

